Preparation of Pseudo Ground Truths. During pre-training, discrimination in the UV space requires pseudo ground truth deformation maps and texture maps of the training images. The pseudo deformation maps are obtained by training a mesh reconstruction baseline on the training set. It outputs a 3D object as a deformation map and a texture map as well.
Subsequently, the associated pseudo texture maps are obtained through a form of inverse rendering, , projecting the foreground pixels from the natural images onto the UV space. Since only the visible regions can be projected to the UV space, all the resulting pseudo texture maps are in fact partial. During training, the generated texture maps are masked to form partial texture maps as well prior to discrimination. More details of pseudo ground truths preparation can be found in [1]}.
